Answer: If the oxidation number of copper changes from 0 to +2 then yes this is a redox reaction as copper lost 2 electrons and was oxidized.
Explanation:
When an element or atoms loses an electron then it acquires a positive charge.
This charge on an atom represents its oxidation state.
For example, ![2AgNO_{3}(aq) + Cu(s) \rightarrow Cu(NO_{3})_{2}(aq) + 2Ag(s)](https://tex.z-dn.net/?f=2AgNO_%7B3%7D%28aq%29%20%2B%20Cu%28s%29%20%5Crightarrow%20Cu%28NO_%7B3%7D%29_%7B2%7D%28aq%29%20%2B%202Ag%28s%29)
Here, oxidation number of copper changes from 0 to +2.
A redox reaction in which electrons are removed from an atom or a reaction where an increase in oxidation number of an atom takes place is called oxidation-half reaction. The atom itself gets oxidized.
This means that here copper lost 2 electrons and was oxidized.
Thus, we can conclude that if the oxidation number of copper changes from 0 to +2 then yes this is a redox reaction as copper lost 2 electrons and was oxidized.
Answer:
Jack Frost of course!!!!!!!
Answer: The author used the word "conversely" because the first statement he made is in CONTRAST to the second statement he made.
Explanation:
Matter is made up of atoms or molecules that are in constant motion. The motion of these tiny particles ( molecules) gives the object energy. The movement of these molecules depends on the state of matter which includes
--> GASEOUS STATE: Here, the particles are completely free to move and are always in motion.
--> LIQUID STATE: particles in this state slide by one another and are always in motion.
--> SOLID STATE: particles in this state are held tightly together but are always in motion.
Also, the molecules in motion are greatly affected by temperature changes. Increase in temperature will cause the particles in the liquid to move faster. Such is seen when soup is heated, the molecules travel faster than before. But the OPPOSITE is seen in an ice cube. This is because the ice cube is in solid state and of a lower temperature.
Answer:
Na(OH)²
Explanation:
We look for the charges in the periodic table
Given the energy obtained by the human body from a candy bar = 915 kJ
Energy required to vaporize 1 g of water at it's boiling point is referred to as heat of vaporization of water.
The heat of vaporization of water = 2260 J/g
Mass of water that can be vaporized by 915 kJ of heat = ![915 kJ * \frac{1000 J}{1kJ} *\frac{1 g}{2260 J} =405 g](https://tex.z-dn.net/?f=915%20kJ%20%2A%20%5Cfrac%7B1000%20J%7D%7B1kJ%7D%20%2A%5Cfrac%7B1%20g%7D%7B2260%20J%7D%20%3D405%20g)
Density of water = 1 g/mL
Converting mass to volume in L of 405 g water:
Therefore, 0.405 L of water can be vaporized